•  
  •  
 
Nano Research

Article Title

Asymmetric interfaces and high-

Authors

Lili Qu, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;
Da Lan, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;
Liang Si, Institut für Festkörperphysik, TU Wien, 1040, Vienna, Austria ;
Chao Ma, College of Materials Science and Engineering, Hunan University, Changsha, 410082, China;
Shasha Wang, Anhui Key Laboratory of Condensed Matter Physics at the Extreme Conditions, High Magnetic Field Laboratory and Hefei Science Center, Chinese Academy of Sciences, Hefei, 230031, China;
Liqiang Xu, Insititutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China;
Kexuan Zhang, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;
Feng Jin, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;
Zixun Zhang, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;
Enda Hua, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;
Binbin Chen, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;
Guanyin Gao, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;
Feng Chen, Anhui Key Laboratory of Condensed Matter Physics at the Extreme Conditions, High Magnetic Field Laboratory and Hefei Science Center, Chinese Academy of Sciences, Hefei, 230031, China;
Haifeng Du, Anhui Key Laboratory of Condensed Matter Physics at the Extreme Conditions, High Magnetic Field Laboratory and Hefei Science Center, Chinese Academy of Sciences, Hefei, 230031, China;
Karsten Held, Institut für Festkörperphysik, TU Wien, 1040, Vienna, Austria ;
Lingfei Wang, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;
Wenbin Wu, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, , Hefei, 230026, China;

Keywords

oxide heterointerfaces, asymmetric interfacial effects, ferromagnetic order, charge transfer

Abstract

Interfacial magnetism in functional oxide heterostructures not only exhibits intriguing physical phenomena but also implies great potential for device applications. In these systems, interfacial structural and electronic reconstructions are essential for improving the stability and tunability of the magnetic properties. In this work, we constructed ultra-thin La0.67Ca0.33MnO3 (LCMO) and SrRuO3 (SRO) layers into superlattices, which exhibited a robust ferromagnetic phase. The high Curie temperature (TC) reaches 291 K, more than 30 K higher than that of bulk LCMO. We found that the LCMO/SRO superlattices consisted of atomically-sharp and asymmetric heterointerfaces. Such a unique interface structure can trigger a sizable charge transfer as well as a ferroelectric-like polar distortion. These two interfacial effects cooperatively stabilized the high-TC ferromagnetic phase. Our results could pave a promising approach towards effective control of interfacial magnetism and new designs of oxide-based spintronic devices.

Share

COinS